An alteration to the word "girl." This alternate spelling indicates a different class or type of girl. Most notably, lesbian and bisexual girls have adopted this spelling to describe themselves as an outcast or different type of the typical "girl."
Additionally, and less sexually arousing, all girls who feel that they rebel, practice feminism and punk rock enough to be identified as seperate from the typical "girl" also adopt the spelling of "grrl", or "girrl", "gurrl", etc.

An altnerative spelling for the word girl acquired by doubling the letter "r" while simultaneously subtracting both the letter "i" and any possibility of intelligence. Originally intended to convey a grrwling tigrr-like attitude, but has instead come to signal to listeners that spending further time in conversation with any self-described grrl will almost certainly result in an unfortunate dearth of intellectual stimulation.